Sets the parameters used for mixing a new loaded sound to the actual editing session contents: this feature is very useful if you want to apply a background sound to your editing session. The background sound can be also put in loop for a given range and you can apply a flat volume change to both the new loaded sound and the current sound contents of the editing session.

The call to this method must be performed after a call to the SetMixingPos method.

A mixing session can be performed after setting the loading mode to LOAD_MODE_MIX through a previous call to the SetLoadingMode method.